Bumps kamailio to version 5.4.2 and removes the suffix, as there is only
one kamailio version at a time anyway.
Also:
- Replaces a few $(PKG_NAME) uses with simply "kamailio"
- Drops the use of variable PKG_VARIANT (was not set anyway)
- Drops 160-openssl-deprecated.patch (upstream first accepted the
patch, then dropped it again after crashes were reported, see [1])
[1] https://github.com/kamailio/kamailio/issues/2466
Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>
